Cutter for pantograph engraving machines



Oct. 3, 1950 M. H. PREIS ETI'AL CUTTER FOR PANTOGRAPH ENGRAVING MACHINES Filed Nov. 1, 1947 W H P IN VEN TORS.

E J J. A. HO FMA V A T TORIVEY Patented Oct. 3, 1 956 CUTTER FDR PANTOGRAPH ENGRAVING MACHINES Martin EPrcis, Crawford, and Jakob "A. Hoffmann, LyndhurshN. J assignors to H. P; Preis EngravingMaohine 00., Newark, N. J., a partnership consisting of 1 Elizabeth J. Preis and -Mar.tin. H. Preis Application November 1, 194?,Se1i'al No. 783,582

4 Claims.

- 1 This invention relates ters for lpantograph engraving machines. It is the object of this invention to provide a cutter adapted to be insertedinto the spindle-or holder of such machine to enablethe reproduction of lettering and other indicia in a form diiferentin degree of thickness than that of thetraced master copy type. The invention is especially adapted for use for cutting into name plates and: the like, lettering of unique outline and'containing gradations which are characteristic of script and simito improvements in cutlar types of lettering, while using only the con ventional master copy type of" uniform outline,

These and other advantageous objects, which will appear from the drawings, and from the description hereinafter, are accomplished by the structure of the invention, of which one embodiment is illustrated in the drawings. It will be apparent, from a consideration of said' drawings, and the following description, that the invention may be embodied in other forms suggested there by, and such other forms asicome within the scope of the appended claims are to be considered within the scope and purview of theinstant invention. 7

In the drawings: Fig. lis a side elevational view of a cutter spindle of a form which may be used in carryingv out the invention,

Fig. 2 is a side elevational view of a cutter embodying the invention,

Fig. 3 is an enlarged elevational viewof the cutter tip, taken on line 3- -3'of Fig. 2,

Fig. 4 is an enlarged elevational view thereof, taken on line l l of Fig. 2,

Fig. 5 is a similar view, taken on line 55 of Fig. 4,

Fig. e is an enlarged fragmentary view of'a section of the name plate which has been cut by the cutter of the'invention,

Fig. '7 is a similar-view, showing cut obtained on rotation of the'cutterto a position 90 to that of which the cut of Fig. 6 was made,

Fig. 8 is an enlarged bottom plan View, taken on line 8-8 of Fig. 4, and

Fig. 9 is a fragmentary perspective view,.s chematically illustrating the method of operation of the pantograph mechanism, provided with a cutter embodying the invention.

In Fig. 2 of the drawings, there is shownaone form of cutter embodyingthe invention, comprising an elongated tubular body member it, provided with a cutting pOint or'cutter-tip i i formed by cutting three faces into said tip at 30 angles to the longitudinal axis of the cutter, said three faces being indicated in Fig. 8 by the ref erence characters 26, 21, 28, andbeing disposed with respect to each other as indicated by the lines 26a, 21a, 28a, said lines indicating the lines of intersection of a plane perpendicular to the longitudinal axis of the cutter with the faces 2S, '2? and-28; respectively, and showing the right angular relationship of the intermediate line 27a with the adjacent and parallel linesita and 280:. A fourth cut is made into the extreme tip of the cutter to provide a face 35 intersecting the faces 26 and Z8 and terminating at the point 3-6. The line of intersection Zia-between the faces 35 and 28 is as indicated in Figs. 4 and-5 at an angle of 10 to the projection line 38 which is drawn from point 36, which is the outermost point of the cutter, the projection line 38 lying-in a plane per pendicular to the tool axis. The line of inter section between the faces 35and-26 is, as indicated by the projection line'til in Figs. 4. and 5, at an angle of 5 with the line 29,-thus makingthe total angle between the last named intersection line and the projection line 38, 15. Thus the cutting portion of the cutter is defined-"by four faces numbered 26, 21, 28,'and 35, all of which are cut or lie in planes Which-are at acute angles with respect to the longitudinal axis of the'cutter and intersect to provide a common point 36 lying in the axis of the cutter. It will be -notedthat the face 35 is relatively smaller in-area than the remaining. faces .and that this face lies in a plane 'which intersects the adjacent faces 2B and 28 along lines which lie at different angles to a transverse plane passing through the point "36 and disposed perpendicularly to the axis of the cutter. This provides desirable relief for the lower, substantiallyradial cutting edge of the face 35 as clearly shown in Fig. 5. By this arrangement, when the cutter is positioned with the face 28 thereof facing thedirection.ofmovement of the cutter, the cutter will make .awide .L- shaped cut 3| in the materiaLof the name plate 2 3 or other object being out. When the cutter is disposed so that the face ZLthereof is pointedin thedirection in which the cutter is moved, said cutter will make a narrow V-shaped cutfiE .as shown in Fig. '7. Between theright angle sepa rated positions of the cutter of Figs. 6 and *1, the cutter may be rotatedto any intermediate position to cut the name plate 24 according to the position of thecutterwith relation to the direction of movement thereof. If the cutter is moved in the direction faced by face 26 thereof, thenacut will be produced, which will, because of face 35,

be less shallow than the cut 3 I. Similarly, if they rear face 3'! of the cutter (Fig. 5) is pointed in the direction of movement of the cutter, a out similar to cut 32 of Fig. 7 Will be produced, but, because of face 35, of more shallow outline. The cutter is preferably made of relatively hard material, while the plate 24 may be made of a comparatively softer material. The cutter I is preferably provided with a fiat portion I2 or the like, and is adapted to be inserted into recess in of cutter spindle or holder 13, the latter having an aperture [5 communicating with the recess M for a set screw it to bear against the fiat 7 portion I2 of the cutter, to lock the same in position (Fig. 9). The cutter spindle l3 may be provided with a handle H or the like to enable the same to be manually rotated if desired and may be positioned in the bracket IS with the spring 34 disposed between a collar iSa on the cutter and the bracket l8, to normally hold the cutter just clear of the surface of the name plate 24 or very lightly bearing thereon. The bracket I8 is secured to the pantograph mechanism arm 19 which, as will be apparent to those skilled in this art, is connected to another pantograph mechanism arm IS, the latter being provided with a tracing style holder 20 in which the tracing stylus 2| is secured. The name plate 2 3, to be inscribed, is held by any suitable workholding clamp 22 upon a work table 22. The master copy type 23, to be reproduced, is positioned in a copy-holder slide 33, or the like. By this arrangement, the master copy type may be reproduced on the name plate 24 at a different scale, as will be apparent to those skilled in the art.

The cutter body Ill may be fixed to the spindle or holder l3 secured to the pantograph mechanism arm E9 to provide variations in thickness of the lettering reproduced, as at 25, although the original or master type 23 is of uniform thickness. This is due to the fact that the cutter will be moved along different angles to the longitudinal axis of the plate 20 in the movement of the pantograph mechanism and by virtue of the different angular positions of the cutter, the cuts produced thereby (Figs. 6 and '7) will differ correspondingly. This result may be obtained automatically by fixing the cutter against rotation in the bracket I8. 1

If desired, the cutter holder l3 may be re tatably positioned in the bracket 18, as indicated in Fig. 9 and provided with a handle IT or the like to facilitate the manual rotation thereof, whereby the user may rotate the cutter to provide gradations of width of the lettering 25 according to the degree he desires. Thus, by the use of a simple standard master copy type, it is possible to reproduce individually stylized lettering 25 on name plates 24. The term lettering as herein used, shall be deemed to in elude any indicia or design;

Having thus described our invention, what we claim as new and desire to secure by Letters Pat ent, is:

1. A cutter for pantograph engraving machines comprising an elongated cutter body, a cutting oint on one end of said body, said cutting point being defined by three faces cut at an angle of to the longitudinal axis of the cutter and angularly disposed with respect to each other so that a transverse section at right angles to the longitudinal axis of the cutter defines lines of intersection with said three faces such that two of said lines are each connected to the third line by right angles, and a fourth face cut by a plane intersecting two of said three faces and the longitudinal axis of said cutter at an angle to define a line of intersection with one of said two faces which is substantially 10 to a projection line perpendicular to the axis of the cutter, and to define with the other of said two faces a line of intersection which is substantially 15 to said perpendicular projection line.

2. A cutter for pantograph engraving machines comprising an elongated cutter body, a cutting point on one end of said body, said cutting point being defined by three faces cut at a common acute angle with respect to the longitudinal axis of the cutter and angularly related to each other so that a transverse section at right angles to the longitudinal axis of the cutter defines lines of intersection with said three faces such that two of said lines are each connected to a third line by right angles, and a fourth face cut at an acute angle to a projection line perpendicular to the longitudinal axis of said cutter and intersecting two of said three faces along lines having different angular relations to said perpendicular projection line to provide a relieved cutting edge.

3. A cutter for pantograph engraving machines comprising an elongated cutter body, a cutting point on one end of said body, said cutting point being defined by three faces cut at a common angle to the longitudinal axis of the cutter and angularly related to each other so that a transverse section at right angles to the longitudinal axis of the cutter defines lines of intersection with said three faces such that two of said lines are each connected to the third line by right angles, and a fourth face defined by a line of intersection between said fourth face and one of said three faces which line is at an angle of substantially 10 to a projection line (perpendicular to the axis of said cutter, and a second line of intersection between said fourth face and another of said three faces which second line of intersection makes an angle of substantially 15 with said perpendicular projection line.

4. A cutter for pantograph engraving machines comprising an elongated cutter body, a cutting point on one end of the body, said cutting point being defined by four flat faces cut at acute angles to the longitudinal axis of the cutter, said faces intersecting at a common point lying within the longitudinal axis of the cutter, one of said faces being relatively small in area in comparison to the areas of the other three faces, said face of smaller area lying in a plane intersecting the planes of two adjacent faces along straight lines which are inclined at different angles to a transverse plane passing through said common point perpendicular to the axis of the cutter to therebr provide a relieved substantially radial cutting e, ge.

MARTIN H. PREI-S. JAKOB A. HOFFMANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS I-ledin Mar. 26, 1946 

